Hi i need to build a current detector using a small shunt resistor on the low side, and if there is current flowing i need to light a led, when there is no current the same led flash.
I was thinking building it using la low offset amplifier (mc33272) to detect very small signal on the shunt (les than 1mv) and configure it as a high gain. for the flasher i would take the second amplifier. and then i needed two diode to combine together the light up the led, but that takes a lot of resistors.
how would you build it? Pricing and number of parts is very important i will have to solder all those parts for high volume production.
It works on simulation but if is there a better way to do it?